Question

@ManagedBean(name="helloBean")
@SessionScoped
public class HelloBean implements Serializable {
    @Inject
    @Named("loginService")
    LoginService loginService;

    private String name;

    public String getName() {
        return name+"-->"+loginService.serviceDetails();
    }

    public void setName(String name) {
        this.name = name;
    }
}

…

    @Named("loginService")
    public class LoginServiceImpl implements LoginService {

        public String serviceDetails() {
            return "==From Service==";
        }
    }

ApplicationContext.xml file:

<beans
    <context:component-scan base-package="com.myapp"/>
</beans>

I am getting null pointer exception for loginService at return
name+"-->"+loginService.serviceDetails();

1) How can I solve above problem

2) instead of @ManagedBean(name="helloBean") can I use @Inject? how to do that?

Answer 1

I don’t think you can use @ManagedBean and and spring at the same time. If you want your beans to be managed by spring, you need to use the spring ELResolver (in faces-config.xml) and then use @Named and @Scope("session") on the JSF beans as well. Then you can (and must) use @Inject rather than @ManagedX

And as a sidenote – avoid referring to non-jsf beans by name – rely on their type only – it will save you headaches with refactoring, at least. And for the JSF beans you can rely on the default naming and use @Named without arguments.